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/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* James W. Williams of NASA Goddard Space Flight Center.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1991, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)cksum.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#include <sys/cdefs.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "extern.h"
void usage __P((void));
int
main(argc, argv)
int argc;
char **argv;
{
extern int optind;
u_long len, val;
register int ch, fd, rval;
char *fn;
int (*cfncn) __P((int, unsigned long *, unsigned long *));
void (*pfncn) __P((char *, unsigned long, unsigned long));
cfncn = crc;
pfncn = pcrc;
while ((ch = getopt(argc, argv, "o:")) != EOF)
switch(ch) {
case 'o':
if (*optarg == '1') {
cfncn = csum1;
pfncn = psum1;
} else if (*optarg == '2') {
cfncn = csum2;
pfncn = psum2;
} else {
(void)fprintf(stderr,
"cksum: illegal argument to -o option\n");
usage();
}
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
fd = STDIN_FILENO;
fn = NULL;
rval = 0;
do {
if (*argv) {
fn = *argv++;
if ((fd = open(fn, O_RDONLY, 0)) < 0) {
(void)fprintf(stderr, "cksum: %s: %s\n",
fn, strerror(errno));
rval = 1;
continue;
}
}
if (cfncn(fd, &val, &len)) {
(void)fprintf(stderr, "cksum: %s: %s\n",
fn ? fn : "stdin", strerror(errno));
rval = 1;
} else
pfncn(fn, val, len);
(void)close(fd);
} while (*argv);
exit(rval);
}
void
usage()
{
(void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n");
exit(1);
}
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